<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>分区</title>
</head>
<body>
<!--div:块级分区,独占一行-->
<div>div1</div>
<div>div2</div>
<div>div3</div>
<!--span:行内分区,共占一行-->
<span>span1</span>
<span>span2</span>
<span>span3</span>
</body>
</html>